Axial ratio anomalies and electronic topological transitions in Cd0.80Hg0.20 at high pressures

S. Speziale*, R. Jeanloz, S. M. Clark, S. Meenakshi, V. Vijayakumar, A. K. Verma, R. S. Rao, B. K. Godwal

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

High-pressure angle-dispersive X-ray diffraction measurements show that Cd0.80Hg0.20 alloy remains in the hcp structure up to 50 GPa. We observe subtle anomalies in the pressure variation of the lattice parameters and their ratio, and in normalized stress versus strain. Electronic-structure calculations, as well as experimental and theoretical results for Cd, suggest that these anomalies are related to the occurrence of electronic topological transitions. Our results support Lifshitz's prediction that electronic phase transitions can cause anomalies in structural and elastic properties of materials.

Original languageEnglish
Pages (from-to)2325-2331
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number9
DOIs
Publication statusPublished - Sep 2008
Externally publishedYes

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